Eyeglasses.



No. 794,767. PATENTED JULY 18 1905. L. F. ADT.

EYEGLASSES.

APPLIOATION FILED AUG. 4, 1904.

-NITED STATES Patented July 18, 1905.

LEO F. ADT, OF TROY, NEI/V YORK.

EYEGLASSES.

SPECIFICATION forming part of Letters Patent No. 794,767, dated July 18, 1905.

Application filed August 4, 190a. Serial No. 219.483.

T all whom it may concern.- I

Be it known that I, LEO F. ADT, of Troy, in the county of Rcnsselaer and State of New York, have invented certain new and useful Improvements in Eyeglasses; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My present invention relates to improvements in eyeglasses, more especially to that class wherein the lenses are connected by a relatively elastic or resilient bridge which is capable of being operated by the manipulation of the lenses in order that the nose-engaging devices may be separated; and the purpose of my invention is to provide eyeglasses of this character which permit ample separation of the nose-guards with the least strain upon the spring and which enable a wide range of adjustment in order that they may be properly fitted to the facial characteristics of different persons, the parts'of the spring being so formed as to be substantially invisible; and to these and other ends it consists in certain improvements and combinations and arrangements of parts that will be hereinafter more fully explained, the novel features being pointed out particularly in the claims hereunto annexed;

In the drawings, Figure 1 is a perspective view of a pair of eyeglasses embodying my invention. Fig. 2 is a perspective view of the spring with the lenses and guards detached;

and Fig. 3 is a view similar to Fig. 2, showing a modified form of spring.

My invention as embodied in its present form is shown applied to that type of eyeglasses wherein the lenses are connected by a resilient bridge which is capable of being manipulated by a relatively horizontal bending of the lenses to cause a separation of the nose-guards, and in that embodiment of my invention which is shown in Figs. 1 and 2 it comprises a bridge-spring 1, the central portion of which is preferably arched and provided with the rearwardly-extending arms 2, which are disposed in approximately a horizontal plane, and to these arms are connected the doubled or looped portions 3, which preferably extend downwardly from the rear ends of the arms 2 and are formed by bending the material downwardly from the said arms, thence inwardly, and finally upwardly to form the substantially vertically disposed loops the arms of which lie in a plane substantially parallel with that of the lenses. In one form of my invention the free end of each loop is extended forwardly and thence downwardly to form the attaching-arm 4, which will occupy a relatively vertical position, as shown in Figs. 1 and 2, or, if desired, the free end of each loop 3 may be extended directly forward in a direction transversely to the plane of the lenses to enable the attaching-arm 5 thus formed to enter the lens-attaching device from the rear, as shown in Fig. 3. These lens-attaching devices may be of any desired construction, those shown embodying the box 6, which in Fig. l is provided with the vertically-extending seat 7 to receive the attaching-arm 8 of the guard 9, which may be of any desired form and the substantially vertically extending attaching portion 4 of the spring, a fastening-screw or other device 1 being employed for securing these attaching portions in position relatively to the attaching devices, lenses being secured to these devices in any suitable manner, such as by the clamping-lugs 19 and screw 20,which engage the opposing faces of the lens and the projections 11, which engage the edge thereof. In that form of spring shown in Fig. 3 the attaching-arms 5 of the spring are secured to the attaching devices from the rear or in a direction transversely to the plane of the lenses, and I therefore employ an attaching device 12, which is capable of receiving the horizontally-extending attaching-arm 5.

Eyeglasses embodying my invention enable a wide range of adjustment to be obtained by the optician in fitting them to the wearer, as the increased length of the spring permits ample adjustment for pupillary distance and the shaping of the spring in order to compensate for-the irregular facial characteristics of the wearer, while the disposition of the ma terial of the spring is such as to render a large portion of it practically invisible, especially so when flat material is employed, al-

though I do not so limit myself. Moreover,

the increasedlength of-springamplifies the resilient action of the bridge, and by forming the vertical loops 3 in the spring the action of the latter during the manipulation of the lenses will not only be a flexing or bending one upon the rearwardlyextending-arms 2 and the central portion of the spring, but will be a torsional one by reason of the disposition of the l'iops 3, and while in some cases it may be advantageous to extend the attach ing portions of the spring upwardly and forwardly, and thus add the bending action of the arms 4 to that of thespring, it will be" understood that these attaching portions may I be led directly'forward from the loops to the attaching devices, as in Fig. 3,'for it will be "observed that in such a spring the range of adjustment ofthe arms 2 in a relatively lat eral direction for papillary distance, for instance, will be practicallyunlimited.

It is -i preferable to form' these springs of flat material, for the reasonthat it enables comparatively heavy springs to be employed, the arms 2 aud t-and the loops 3 of which'will present their edges instead of their-fiat surfaces toward thef-ront of the eyeglasses; but itwill be understood that material of different crosssections may-be employed, if desirable.

Moreover, by forming the springs inthe manner above describedthe-approximate center about which the guard's move during themanipulation of the lenses will be near the attaching devices,thus insuring the maximum separation of the guards, and byextending 1 the ends o f'the spring beyond these'attaching 1 devices and forming the loops i-n'rear thereof these loops willbe' practicallyinvisible from= thei ront of the eyeglasses and will-not ob-' str'uctthe field ofvision.

I'claim as my invention A 1. In eyeglasses, the combination with the lenses, of a bridge composed of're'silient materialembodying the'central portion-having ofthe'lenses.

2. 1n eye'glasses, thecombination with the lenses, of a bridge carrying the attaching devices composed of resilient material embodying the central portion having the rearwardlyextending arms, and the loopslocated in rear of the attaching devices, each having one arm thereof connected to the rearwardly-extending arm of the spring, and the other'arm to the attaching devices for the lenses, the arms of the loops "lying in a plane substantially parallel to that of the lenses.

3. In eyeglasses, the combination with the lenses having the attaching devices,of a bridgespring embodying the central portion having the substantially horizontal rearwardly -ex tending arms, and the loops the arms of which lie in a plane parallel to that oi the lenses and forming a connection between the rearwardlyextending arms of 'thespring' andthe attaching devices.

4:. In eyeglasses, the combinationwith the lenses having the attaching devices, of a bridgespring embodying the central portion having the rearwardly-extending arms which'are provided'with loops that are located in rear of the attaching devices, the arms 0t said loops lyingin a plane substantially parallel with that of the'lenses, and forminga'connection between the spring and 'the attaching devices.

5. In eyeglasses, the 'combinationwith the lenses havingthe attachingdevices, of a bridgespringembodying the central portion having the arms extending substantially transversely to the plane of the lenses, andthe'loops formed substantially at right angles to-the saidarms the arms of the loops lying in'a plane substantially parallel to the plane ofthe lenses and-forming a connection between the arms of the spring and the attaching devices.

6. In eyeglasses, the combination with the lenses, of a bridge-spring connecting them embodying the central portion'theends of a I which extend rearwardly,-thence downwardly inwardly and upwardly, the ends of the loops thus formedbeing attached to" the lenses.

7 In eyeglasses, the combination with the 'lenses, of a bridgespring-connecting:them embody1ng=the central portion, the ends of which extend rearwardly, thence doubled downwardly, inwardly upwardly and forwardly toform attaching portionsad'apted to 

